Add rtic_lpspi example #419

	# Use the template to create a new starter teensy4-rs project,
	# and make sure it compiles.

	name: Check Template

	on:
	push:
	branches: [ master, trying ]
	schedule:
	# At 15:28 on a Thursday
	- cron: "28 15 * * 4"

	jobs:
	template:
	runs-on: ubuntu-latest
	steps:
	- name: Install toolchain
	run: rustup toolchain install stable --no-self-update --profile minimal --target thumbv7em-none-eabihf
	- name: Install cargo-generate
	env:
	VERSION: v0.21.0 # Keep this in sync with version in PACKAGE
	PACKAGE: cargo-generate-v0.21.0-x86_64-unknown-linux-musl
	run: \|
	curl -LJ https://github.com/cargo-generate/cargo-generate/releases/download/${VERSION}/${PACKAGE}.tar.gz \| tar xz && \
	ls -al && \
	cp cargo-generate $(dirname $(which cargo)) && \
	cargo generate --help
	- name: Generate the template
	run: cargo generate --git https://github.com/mciantyre/teensy4-rs-template --name krate --branch ci
	# https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions
	- name: Extract branch name
	shell: bash
	run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
	id: extract_branch
	- name: Update template to target integration branch
	run: sed -i "s/branch = \"master\"/branch = \"${{ steps.extract_branch.outputs.branch }}\"/g" krate/Cargo.toml
	- name: Check the template
	run: cd krate && cargo build

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